package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.exception.UserNotLoginException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    public static final String WX_Login_URL = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        Map<String,String> paramMap = new HashMap<>();
        paramMap.put("appid",weChatProperties.getAppid());
        paramMap.put("secret",weChatProperties.getSecret());
        paramMap.put("js_code",userLoginDTO.getCode());
        paramMap.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_Login_URL, paramMap);
        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");

        //判断是否为空，空代表登录失败，抛异常
        if(openid == null){
            throw  new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否是新用户
        User user =  userMapper.findByOpenId(openid);
        if(user != null){
            return user;
        }
        User u = User.builder()
                .openid(openid)
                .createTime(LocalDateTime.now())
                .build();
        userMapper.insert(u);
        return u;
    }
}
